Changing Kernel By Selecting Kernel Name does not handle errors

[IMAM9AIS]

Jupyter lab has the functionality of changing kernels by clicking on kernel name on top right hand side of the file.

Two scenarios arise when this is clicked:-

1. Kernel change happens without any errors which is fine.

2. There is some exception that gets generated in which case, the kernel silently switches back to the original kernel, without any exception message being thrown on the screen. Although we have exceptions being printed in the lab server, this is not user friendly. We identified this issue while using remote kernels being spawned through Jupyter enterprise gateway, where we limit the number of kernels being launched. Once the user reaches the required amount of kernels, the user is not able to switch the kernel also, without any exception being seen on screen.

[IMAM9AIS]

Closing issue resolved by #7094